blob: bb6f5d6ceea0cd370340b3d5b44132f21639316d [file] [log] [blame]
What: /sys/devices/*/<our-device>/nvmem
Date: December 2017
Contact: PrasannaKumar Muralidharan <>
Description: read-only access to the efuse on the Ingenic JZ4780 SoC
The SoC has a one time programmable 8K efuse that is
split into segments. The driver supports read only.
The segments are
0x000 64 bit Random Number
0x008 128 bit Ingenic Chip ID
0x018 128 bit Customer ID
0x028 3520 bit Reserved
0x1E0 8 bit Protect Segment
0x1E1 2296 bit HDMI Key
0x300 2048 bit Security boot key
Users: any user space application which wants to read the Chip
and Customer ID